<em>The right question is:</em>


Answer:
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Step-by-step explanation:
Given


Required
Solve for x and y
Make y the subject of formula in the second equation

Substitute
in the first equation

Open the bracket


Collect Like Terms




Multiply both sides by 2


Divide both sides by 31



Recall that 
So;



Hence;
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<em> and </em>
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Answer:
12
Step-by-step explanation:
Answer:
b=20
C=160
Step-by-step explanation:
160+b= 180 (sum of angle on the straight line)
b=180-160
b=20
b+c =180 (sum of angle on the straight line)
20+c=180
c=180-20
C=160
Answer:
A
Step-by-step explanation:
Calculate the midpoint using the midpoint formula
[ 0.5(x₁ + x₂ ), 0.5(y₁ + y₂ ) ]
with (x₁, y₁ ) = (- 1, 5) and (x₂, y₂ ) = (5, 5)
midpoint = [ 0.5(- 1 + 5), 0.5(5 + 5) ]
= [ 0.5(4), 0.5(10) ] = (2, 5 ) → A
Answer:
percents to decimals
a) .02 b) .79 c) 1.35
Step-by-step explanation:
for converting percents to decimals you always move the decimal over to the left 2 times